| 摘要 |
PURPOSE: An ammeter for detecting rating and overload is provided to detect the electrical current and the overload and to detect the quantities of the overload and the degree of the spare load of the ampere by displaying the quantities of the load with a displaying scale. CONSTITUTION: The ammeter for detecting rating and overload includes pivots(271A,272B), spirall springs(241A,241B) and driving coils(261A,261B). Each driving coil binds cooper or aluminium enameled wire on the aluminium bound mold and the pivots(271A,271B) are installed upper and lower side of the driving coil and it is supported by a supporting stone and is rotated. Each spiral spring(241A,241B) is the leaded tin bronze or an alloy of gold, silver and copper and carries out the function of a conductor for connecting the coil to electricity and the function of generating a control torque in proportion to shaking of the driving coils(261A,261B).
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